Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 72, NWS Shreveport, LA

April 9, 20214 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 9, 2021, 6:49 PM CDT for 4 parishes in Louisiana. It was in force for 56 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 9, 2021, 6:49 PM CDT (23:49 UTC)
Expired: Apr 9, 2021, 7:45 PM CDT
In force: 56 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bienville Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Red River Parish, LA

The radar

The Shreveport radar (KSHV), 38 km from the middle of the area, began a volume at 23:53 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 9, 7:25 PM CDT	HAIL 0.75	3 Sw Hall Summit, LA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 9, 5:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 11.8 hours before the alert went out and 35 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 928 J/kg
Mixed-layer CIN: -310 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

218 
WUUS54 KSHV 092349
SVRSHV
LAC013-017-031-081-100045-
/O.NEW.KSHV.SV.W.0072.210409T2349Z-210410T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
649 PM CDT Fri Apr 9 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Central De Soto Parish in northwestern Louisiana...
  Northwestern Red River Parish in northwestern Louisiana...
  Southeastern Caddo Parish in northwestern Louisiana...
  Southwestern Bienville Parish in northwestern Louisiana...

* Until 745 PM CDT.

* At 648 PM CDT, a severe thunderstorm was located near Mansfield,
  moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Mansfield, Hall Summit, Ninock, Carmel, Crichton, Caspiana, Grand
  Bayou and Loggy Bayou.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3209 9376 3233 9355 3231 9355 3231 9353
      3229 9355 3229 9354 3230 9352 3227 9352
      3227 9350 3224 9349 3224 9348 3226 9348
      3225 9346 3224 9347 3224 9342 3217 9328
      3196 9362
TIME...MOT...LOC 2348Z 230DEG 18KT 3208 9363 

HAIL...1.00IN
WIND...60MPH
 
$$

50

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 2:28 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Claiborne, Webster	32 min
Apr 9, 2:51 PM CDT	Special Weather Statement	SHV	Caddo	39 min
Apr 9, 4:28 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln, Webster	47 min
Apr 9, 5:01 PM CDT	Severe Thunderstorm Warning	SHV	Union	44 min
Apr 9, 5:15 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Ouachita, Union	45 min
Apr 9, 5:38 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Claiborne, Webster	67 min
Apr 9, 5:40 PM CDT	Special Weather Statement	SHV	De Soto	50 min
Apr 9, 5:44 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita, Union	46 min
Apr 9, 5:49 PM CDT	Severe Thunderstorm Warning	SHV	De Soto	56 min
Apr 9, 5:54 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Ouachita, Winn	66 min
Apr 9, 5:58 PM CDT	Severe Thunderstorm Warning	SHV	Union	21 min
Apr 9, 6:23 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Lincoln, Natchitoches, Red River, Winn	52 min
Apr 9, 6:27 PM CDT	Special Weather Statement	SHV	Bienville	48 min
Apr 9, 6:37 PM CDT	Special Weather Statement	SHV	Ouachita	38 min
Apr 9, 6:40 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln, Union	65 min
Apr 9, 6:55 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita, Union	65 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.